/Engine/Source/Runtime/CoreUObject/Public/UObject/UnrealType.h
Saves off map of array indices per object being set.
void SetArrayIndexPerObject ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), int32 >> InArrayIndices )